Door stop



April 23, 1940. P. E. CHU 2,198,303

ooooooo OP Patented Apr. 23, 1940 UNITED STATES PATENT lorries 4 Claims.

This invention relates to a door stop.

An object of the invention is the provision of a door stop having a base member and an vupstanding member which extends suificiently above the base member to engage the lower edge of a door so that when the door is moved to its open position and engaged by the upstanding member saidme nber will be flexed and frictionally contact the lower edge of the door for retainin the door in open position, said base member having any configuration suitable for the purpose while theupstanding member has .suilicient width andthickness for the purpose.

Another object or" theinvention is the p rovision of a door stophaving a basemember from which rises one or more fingers formed of elastic material which flex as the lower edgeof the door is forced against the conirontingiace of the finger whereby the contacting surface of the finger will frictionally hold the door against movement, the fingers being vertically disposed or inclined at anangle to-thehorizontal and bendable towards the base member.

A ,furtherobject of the invention is the provision ofa door stop havinga base member which is adapted to besecured toa floorwith the upper face of the base memberspaced from the lower edge of thedoor and-with ,broad fiat flexible fingers rising from the base member, a backrstop also risingfrom Said base member adjacent the wall for restricting final movementoi the door after the lower edge of the. door has passed beyond one or more fingers as the casemay be, the finger adjacent the back-stop preferably being of such a height and preferably being spaced a predetermined distance from the back-stop so that when this finger is flexed .it will have frictional contact with the lower edge of the door when the door engages the backstop and when the said finger has been flexed or moved towards a horizontal position.

A still further object or" the invention is the provision of a back-stop having a base member, a finger rising irom the basemember for engagement with the lower edge of a door and a projection rising from the base member adjacent the wall of a building which will be engaged at its upper end by the bent flexible fingerso that the free end of the finger will be forced. into contact with the free edge of the projection whereby the elastic material in the projection will exert upward pressure against the elastic finger for maintaining the finger in frictional contact with the lower edge of the door.

of the invention as expressed in the appended claims.

In the drawing:

Figure 1 is a View in perspective showing my door-stop applied to the floor of a room in operative relation with a swinging door,

Figure 2 is a vertical section of the stop in flexed condition by contact with the i'ower edge of a door,

Figure 3 is a view in perspective of a modified form of the stop shown in Figs. 1 and 2 Figure i is a view in perspective of another T modification of the stop,

Figure 5 is a View in perspective of a still further modified form of the stop,

Figure 6 is a vertical section. of the stop shown in Figure .5, and

Figure 7 is a view inperspective of a still further modified form of the door stop.

Referringrnore particularly to the drawing, l0 designates a section of a wall of aroo m, Ila

swingable door and i2 afioor. The lower edge E3 of thedoor is spaced from the fioor 12in the usual manner. The distance between the lower edge of the, door and the fioor varies in accordance with the conditions met with.

A door stop, shown in Figs. 1. and 2, has a base member IE secured to the floor in spaced relation with the wali iii by ,means of screws ornails flhis base member may bejcurved along an arc of a circle which corresponds to door passeswhen it is swung to its open or closed position. ,Howevenin Figs. 1 to 6, inclusive, the

base member is in the shapeof a disc.

Rising from the base member is a finger H which has a broad fiat surface adapted to contact with the lower end ii of the door I [after ithas passed the edge 18 at the rear lower portion of the door. The finger it may be formed of resilient or elastic ,material and may also be formed the larcs through which the outer end of, the

integrally with the base member 15 or it may be separate and, connected thereto in any approved manner. ,The .base member i5 maybe formed of the same materialas the finger l1.

.The finger i1 is of sucha height that it may be flexed substantially to the amount shown in Fig. 2 so that the free end I9 of the finger will rise a distance above the lower end l3 of the door ll. The thickness of the finger will depend upon the resiliency or elasticity of the material forming the finger because the finger should have sufiicient strength when flexed to the position shown in Fig. 2 to maintain the door in position against accidental displacement when the door has been fully opened.

Figure 3 shows a similar door stop in which the finger Ila rises from the base member I5 and this finger is triangular in shape but it will function in the same manner as the broad fiat fingers shown in Figs. 1 and 2. In this case, however,

it may be necessary to increase the thickness of v the finger so that it will have sufficient force to maintain the door in position.

In Fig. 4 is shown another modified form in which the finger llb has a corrugated or roughened contacting surface 20 which will operate to increase the frictional contact between the finger and the lower end |3 of the door I In the three forms shown in Figs. 1 to 4, inclusive, the fingers will be flexed to the position shown in Fig. 2. When the edge I8 engages the adjacent face of the finger and when the door is moved towards the wall III the finger will bend, as shown at It, and the outer face of the finger will be in frictional contact with the lower end |3 of the door so that the door will be held in position since it requires some force to move the door from its open position on the bent finger.

When the door is moved from the open position away from the bent finger, the frictional contact between the finger and the lower end of the door will tend to buckle the finger because of the frictional resistance between the lower end of the door and the contacting surface ofsaid finger. Thus it will be seen that the door will be held against accidental movement when in the position shown in Fig. 2.

In Figs. 5 and 6 is shown a further modified form in which the base member |5a has a projection 2| which rises from the base member at one side of the finger I10 and the upper surface of this projection, as shown at 22, is inclined from the upper free end 23 to the lower edge 24 where it joins the rear face 25 of the finger lie. The outer surface 26 of the projection 2| is shaped to conform to the contour of the base member |5a at this point. Since the base |5d is in the shape of a disc the rear wall of the projection 2| may have any suitable configuration.

When the lower end |3 of the moving door engages the outer face'of the finger IIc the said finger, due to the fact that it is formed of either resilient or elastic material, as is the projection 2| and base l5a, will be'flexed until the rear surface 25 of the said finger will be moved into engagement with the free edge 23 of the projection 2|. When this happens the finger llc'will be compressed between the upper edge 23 of the projection 2| as will be the projection when the space between the floor l2 and the lower edge I3 ofthe door is less than the height of the combined heights of the base member I5a, the projection 2| and the width of the finger Ho. The reaction of the projection 2|, after it has been compressed, will tend to force the finger I'lc into rigid holding relation with the lower end of the door H and thus prevent the door from being accidentally released from the stop.

The rear face of the door may engage the wall ID of the room or a back-stop may be located on an extended portion of the base member for engagement with the door, as shown in Fig. 7.

Referring more particularly to Fig. '7 it will be seen that the base member 30 is rectangular in shape and is provided with a pair of upstanding fingers 3| and 32 and an upstanding back-stop 33. The back-stop is adapted to be located adjacent the wall ll] of the room and will prevent the door from coming in contact with the wall. The base member in this case is provided with a plurality of openings 34 and 35 for securing the base member to the floor. The fingers 3| and 32, the base member 30 and the back-stop 33 may be formed of resilient materials or the same may be formed of elastic materials and the fingers and the back-stop may also be formed integrally with the base member.

The fingers 3| and 32 are inclined at an acute angle to the vertical or these fingers may be disposed in a vertical plane. The back-stop, however, is shown as being located in a vertical plane although the said stop may also be inclined to the vertical.

Since the fingers 3| and 32 are formed of flexible or elastic material, the broad flat front surfaces of these fingers may be engaged successively by the lower edge of the door when the door is forced past the free ends of the fingers and moved into engagement with the back-stop 33. Ordinarily the fingers 3| and 32 are of sufficient height that when flexed they will present a sufiiciently broad frictional surface to the lower end of the door and maintain the door in position. On the other hand where the space between the lower end of the door and the floor is restricted the fingers may be flexed to such position that they will contact the upper surface of the base 30. When the space is so restricted, as stated above, the door may be forced past the stop 3| and be retained between the fingers 3| and 32 or the door may be pushed into engagement with the stop 33 and then remain between said stop and the finger 32. The contacting surfaces of the fingers 3| and 32 may be roughened or corrugated as shown in Fig. 4 if desired. These fingers also may be made in the shape shown in Fig. 3 and in that event it may be necessary to increase the thickness of these fingers in order that the resilient or elastic fingers will have sufiicient force to prevent accidental displacement of the door from the stop.

I claim:

1. In a door check, a base member adapted to be connected to a floor of a building, a flexible member rising from an intermediate portion of said base member and presenting a broad fiat surface to the lower edge of a door, said base having a wedge-shaped portion at one side. of

the flexible member, the flexible member adapted to contact the free end of the wedge-shaped portion when the flexible member is flexed by the door.

2. In a door check, a base member adapted to be connected to a floor of a building, a flexible member rising from an intermediate portion of said base member and presenting a broad fiat surface to the lower edge of a door, said base provided with an elastic wedge-shaped portion having the free end thereof spaced from the flexible member so that when the lower edge of the door forces the flexible member into engagement with the free end of the wedge-shaped portion said wedge-shaped portion will be compressed and will urge the flexible member in retaining relation with the lower edge of the door.

3. In a door check, a base member adapted to be connected to a floor of a building, a flexible member rising from an intermediate portion of said base member, formed integrally with the base member and presenting a broad flat surface to the lower edge of a door, said flexible member being inclined at an acute angle to the vertical, a rear wall forming an acute angle with said member and adapted to be engaged by the free end of the wall when the flexible member has been depressed by the door.

4. In a door check, a base member adapted to be connected to a floor of a building, a flexible member rising from the base portion and presenting a frictional surface to the lower edge of a door, a compressible member rising from the base member in spaced relation with the flexible member and of less height than the said flexible member, said compressible member adapted to be engaged by the flexible member when the door is being moved over the flexible member so that said flexible member will be forced downwardly upon the upper end of the compressible member and whereby said compressible member will exert an upward pressure against the flexible member and force the same in frictional contact with the lower edge of the door.

PAUL CI-IU. 

